Cinematograph apparatus.



G. W. COOPER.

CINEMATOGRAPH APPARATUS.

APPLICATION FILED MAR. 16. 1914.

1,259,365. Patented Mar. 12, 1918.

2 SHEETS-SHEET I.

'wn-N 650/?65 BY KRQQK MH KT 1mm EY G. W. COOPER.

CINEMATOGRAPH APPARATUS.

APPLICATION man MAR. 16. 1914.

1,259,365. Patented Mar. 12, 1918.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR (g fi V BY W ATTORNEY GEORGE WILLIAM COOPER, OFLONDON, ENGLAND.

OINEMATOGRAIPH APPARATUS.

To all whom it may concern:

Be it known that I, Gnoner. WILLIAM Coornn, a subject of the Kin ofGreat Britain and Ireland, and residmg at Shaftesbury Hotel, Great St.Andrews street, Shaftesbury avenue, London, W. (3., England, haveinvented certain new and useful Improvements Relating to CinematographApparatus, of which the following is a specification.

This invention relates to improvements in cinematograph apparatus withspecial reference to ap aratus employed for taking pictures suita le foruse with stereoscopic lckerless projection apparatus comprising twolenses the shutters. in connection with which are adapted to operatealternately Hitherto all attempts to obtain stereoscopic flickerlessrojection have failed by reasonjof the di culty that has beenexperienced in obtaining identical images upon the films and insuperposing the same upon the screen so as to give a correctly focusedstereoscopic picture, and it is the object of my invention to provide aform of apparatus which will overcome these difliculties.

According to my invention I provide apparatus for taking pictures forprojection y cmematography comprising a pair of lenses whether simplorcompound which are movable relatively to one another while their axesremain parallel. In this manner it is ossible to obtain identical imagesupon the s while every part of each of such images will be in focus anda stereoscopic effect will be produced.

The invention also consists in the interposition of a second lensbetween each lmage-receiving lens and its corresponding film to bringthe image into correct position relatively to the film which lenshowever may be dis ensed with where the apparatus is. employe forprojecting the pictures.

The invention also consists. in the specific form of apparatushereinafter more particular 'llfyl lreferred to.

. e. accompanying drawings illustrate one mode of carrying out theinvention.

Figure 1 is a rear elevation showing more Specification of LettersPatent.

Patented Mar. 12, 1918.

Application filed March 16, 1914. Serial No: 824,976.

or less diagrammatically one convenient are rangement of apparatusconstructed in accordance with the invention.

Fig. 2 is a fragmentary view showing in sectional plan one portion ofthe apparatus illustrated in Fig. 1.

Fig. 3 is a face view of one of the shutters.

In carrying my invention into effect in one convenient manner I employduplicate sets of mechanism of suitable known construction withcorresponding duplicate projecting lenses 0. For example, the twomechanisms may be as shown in Figs-1 and consist of film-carrying rollsm m adapted to be rotated by means of a hand-wheel n or other suitabledevice and chain or other gearing 0, so that the films b may be drawnthrough the usual gates 39 adjacent to the shutters indicated at g(Fi 1) and illustrated in detail in Fig. 3. he shutters in this form comrisetwo disks 7* each of which is provi ed with a slot '8 and which areadapted to be rotated in opposite directions so that their operationwith respect to the duplicated films b is alternate; that is to say thatthe shutters are arranged to rotate out of phase so that the films arealternately exposed during the operation of taking the plctures.

The mechanism so far described may be of any suitable known character,so that it is unnecessary to describe the same in detail, it beingunderstood that the various parts 'composin such mechanisms may besuitably varied 0th as to their construction and arrangement as may berequired to meet var ing practical conditions. 3

he compound image-receiving lenses, a (Fig. 2) are mounted in slides, 0upon the exterior of the casing, Z, of the apparatus, and-any suitablearrangement is provided for moving the lenses toward or away from oneanother as may bedesired, while keeping their axes parallel and at rightangles to the plane of the films, b. In,the construction illustrated themovement of the lenses is caused by rotation of a milled nut, d, securedto or formed in one with'a right and left hand screw threaded spindle,e, the

two parts. of which are adapted to engage respectively with lugs, f, 9,upon the lenses, a, the arrangement being such that upon rotating themilled nut, d, in the proper direction, the lenses are caused to movetoward one another, the amount of movement that is necessary dependingupon the distance between the lenses and the object the image of whichis required to be taken upon the films, Z). It will be clear that withsuch an arrangement it is possible for the lenses, a, to receivepractically identical images of the object to be photographed, while atthe same time every part of such image will be in focus seeing that theplane of the taking lenses with respect to the object being photographedhas not. been altered.

For the purpose of bringing the images received by the lenses, a, into.their correct positions relatively to the films, b, I interpose betweeneach of the image-receiving lenses and its corresponding film, b, asecond lens, 71., which, for convemence, may be removably mounted in anysuitable manner within the tubes or like fittings, i, the removabilityof such lenses being desirable to facilitate focusing and in case itshould be 7 required to employ the apparatus that has been used fortaking the plctures for subsequently projecting the same upon thescreen, it being then unnecessary to employ the additional lenses, h.

It will be clear that many variations may be introduced into the mannerof giving the necessary movement to the lenses, the above constructionbeing given by way of example only, and the invention is not to beconfined to any particular type of construction of stereoscopiccinematograph apparatus nor to any particular character ofimage-receiving lenses that may be employed in connection therewith.

Having now described my invention, what I claim as new and desire toecure by Letters Patent is 1. Cinematograph apparatus comprising twolenses movable laterally relatively to one another while their axesremain parallel, means for supporting a film adjacent to each lens,shutter mechanism adapted to uncover said lenses alternately and alaterally fixed lens interposed between each of Said movable lenses andthe corresponding film.

2. Cinematograph apparatus comprising two lenses movable laterallyrelatively to one another while their axes remain parallel, means forsupporting a film adjacent to each of said lenses, two oppositelyrotating disks each provided with a slot and so arranged that theyuncover said lenses alternately and a laterally fixed lens interposedbetween each Icgfnslaid movable lenses and the corresponding 3.Oinematograph apparatus comprising two lense laterally movablerelatively to one another while their axes remain parallel, means forsupporting a film adjacent to each. of said lenses, shutter mechanismadapted to uncover said lenses alternately and a removably mounted butlaterally fixed lens interposed between each of said movable lenses andthe corresponding film.

4:. Cinematograph apparatus comprising two lenses laterally movablerelatively to one another while their axes remain parallel, means forsupporting a film adjacent to each of said lenses, two oppositelyrotating disks each provided with a slot and so arran ed as to uncoversaid lenses alternately an a removably mounted but laterally fixed lensinterposed between each of said movable lenses and the correspondingfilm.

5. Cinematograph apparatus comprising two lenses, slides for saidlenses, means for moving the lenses laterally in said slides, means forsupporting a film adjacent to each of said lenses, shutter mechanismadapted to uncover said lenses alternately and a laterally fixed lensinterposed between each of said movable lenses and the corresponding 6.Cinematograph apparatu comprising two lenses, a slide for each of saidlenses, means for moving each lens laterall within its slide, means forsupportin a filin adj acent to each of said lenses, s utter mechanismadapted to uncover said lenses alternately and a laterally fixed butremovably mounted lens interposed between each of aid movable lenses andthe corresponding 7. Cinematograph apparatus comprising two lenses, aslide for each of said lenses, a right and left hand threaded spindle,means upon said lenses engaging said spindle, means for rotating saidspindle, supportin means for a film adjacent to each of sai lenses,shutter mechanism adapted to uncover said lenses alternately and alaterally fixed lens interposed between each of said movable lenses andthe corresponding film.

8. Cinematograph apparatus comprising two lenses, a slide for each ofsaid lenses, a right and left hand threaded spindle, means upon saidlenses engaging said spindle, means for rotating aid spindle, supportingmeans for a film adjacent to each of said lenses, two oppositelyrotating disks each provided with a slot and so arranged as to uncoversaid lenses alternately and a laterally fixed lens interposed betweeneach of gfi movable lenses and the corresponding means f r r a g thescrew threaded spindle, supporting means for a film adja- In'testimonywhereof I have signed my cent to each of said lenses, shutter mecha nameto this specification in the presence of nism adapted to uncover saidlenses altertwo subscribing witnesses. nately and a laterally fixed butremovably GEORGE WTLLIAM COOPER.

' 5 mounted lens interposed between each of Witnesses:

. said movable lenses and the corresponding HERBERT D. JAMESON, film. 0.J. Won'rm.

